These are CNC machined aluminum bricks that have two magnets pressed into the back to allow these metallic bricks to stick to any magnetic surface! Machined right here in Washington State (USA)!
Each pack you will receive x2 BrickMAG's!
Although you can build off the top of the bricks with normal LEGO bricks, we do NOT recommend it. Since these are made from aluminum they will scratch or damage your plastic bricks when connecting onto the top studs.